ACEBEAM EC35 CREE XP-L High Density 1200 Lumens LED Flashlight Acebeam Max output:1200 lumens with CREE XP-L High Density LED with a lifespan of 50,000hours, Use one 18650 or 2*CR123A batteries (not included) Working voltage: 2.7V-9V, Mini Potable Pocket Size: 136mm (Length)*25mm (BEZEL)*22(Body dia.), weight:72g (without batteries).Conforms to IPX-8 standard: 2 meters. Smooth reflector gives perfect beam and throw.Digitally regulated output- maintains constant brightness.Tactical tail switch with momentary-on function.Side switch on the head. Made of durable aircraft grade aluminium. Over-heat protection to avoid high-temperature of the surface. Premium Type III hard-anodized anti-abrasive finish tactical "clicky" switch is fully exposed in the tailcap for easy access,even when wearing gloves.Toughened ultra-clear glass lens with anti-reflective coating. Battery reverse protection function. And batteries low indicalion. (it will flash when voltage down to 3v)